/*
 * Copyright 2025, AutoMQ HK Limited.
 *
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package kafka.automq.backpressure;

import org.apache.kafka.common.Reconfigurable;

/**
 * It checks the {@link LoadLevel} of the system and takes actions based on the load level
 * to prevent the system from being overwhelmed.
 */
public interface BackPressureManager extends Reconfigurable {

    /**
     * Start the back pressure manager.
     */
    void start();

    /**
     * Register a checker to check the load level of the system.
     * Note: It should be called between {@link #start()} and {@link #shutdown()}.
     */
    void registerChecker(Checker checker);

    /**
     * Shutdown the back pressure manager, and release all resources.
     */
    void shutdown();
}
